The staff of the Federal Energy Regulatory Commission has prepared this environmental assessment (EA) for the Connecticut Expansion Project proposed by Tennessee Gas Pipeline Company LLC, with that EA released for comment on Oct. 23.
Tennessee requests authorization to construct and operate certain natural gas pipeline and aboveground facilities along its existing pipeline system in various counties in New York, Massachusetts, and Connecticut to provide an additional 72.1 million cubic feet per day of firm transportation service to three new shippers: Connecticut Natural Gas Corp., Southern Connecticut Gas Co. and Yankee Gas Services Co. The FERC staff concludes that approval of the proposed project, with appropriate mitigating measures, would not constitute a major federal action significantly affecting the quality of the human environment.
The proposed project includes the following facilities:
- installing approximately 1.4 miles of new 36-inch-diameter pipeline loop near the Town of Bethlehem, in Albany County, New York (referred to as the New York Loop);
- installing approximately 3.8 miles of 36-inch-diameter pipeline loop near the Town of Sandisfield, in Berkshire County, Massachusetts (referred to as the Massachusetts Loop);
- installing approximately 8.3 miles of 24-inch-diameter pipeline loop near the Town of Agawam, in Hampden County, Massachusetts and near the Towns of Suffield and East Granby in Hartford County, Connecticut (referred to as the Connecticut Loop);
- modifying the existing Agawam Compressor Station (Compressor Station 261) in Hampden County, Massachusetts;
- installing appurtenant facilities, including a mainline valve, cathodic protection, and pig launchers and receivers along the three pipeline loops; and
- relocating two existing pig receiver facilities.
On July 31, 2014, Tennessee filed an application with FERC for a Certificate of Public Convenience and Necessity for this project. According to Tennessee, average daily volumes delivered onto its system increased by about 32% over the prior four years. With its existing 200 and 300 Line infrastructure reaching capacity, Tennessee states that it is only through the expansion of its existing infrastructure that it would be able to deliver the incremental volumes requested by the project shippers in binding precedent agreements, while maintaining service to existing shippers and pressure profiles necessary for system operations.